Texas → Arizona · Interstate 10
On heavy-rain or dense-fog days the El Paso, Texas, to Tucson, Arizona, leg routinely demands well more than the 4h 47m estimated: Interstate 10 carries known hydroplaning hot spots and reduced-visibility corridors that justify dropping to 35 mph through a few short stretches. The outbound run covers 503 km (313 miles) over varied topography between El Paso (the far-west Texas border city across from Ciudad Juárez and a major Sun Belt logistics hub) and Tucson (the second-largest city in Arizona and gateway to the Sonoran Desert), demanding sharper attention on mountain descents and shoulder-less curves. Before pulling out, check brake-pad wear, tire tread depth, and washer-fluid level in the reservoir. Fuel spend holds near $42.04 for the 45.7 liters (12.1 gallons) consumed. Even in adverse conditions, the flat tariff of $0.43/km guarantees the standard outbound payout of $216.29 — log any incidental costs (extra toll, mandatory meal, emergency lodging) in a separate field on the Clara receipt.